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Doctor insights on: Allergic Reaction To Tb Test

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What happens if you have allergic reaction to TB skin test does it mean that you have tb?

What happens if you have allergic reaction to TB skin test does it mean that you have tb?

Was it allergic?: Was the reaction an allergic reaction or was it a positive sin test? There are components in the test that one can react to in an allergic fashion...The area can be red and itchy. But if it is raised and red and approx the size of a dime, it is a positive test and means you have been exposed to tb. ...Read more

Dr. Scott Lindquist
585 doctors shared insights

Mycobacterium Tuberculosis Infection (Definition)

Mycobacterium tuberculosis is an infectious organism that spreads by droplets coughed out by an infected person. Infection is established initially in lungs, but can spread within lungs & to other body parts, or can become latent, with reactivation occurring years to decades later. With effective treatment, it can be completely eliminated although drug resistant ...Read more


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Might it be possible that a a person have an allergic reaction to the PPD test for tb?

Might it be possible that a a person have an allergic reaction to the PPD test for tb?

Ppd testing: If you are given a TB test, a small amount of the TB bacterial protein is injected into the top layer of the skin. If you have had a prior TB exposure, your immune system would typically have made an immune response and you would see this response in the skin by a raised red reaction at the injection site. Interpretation of this reaction requires an experienced physician for grading. ...Read more

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What do you suggest if my friend is worried about her reaction to PPD (tb) test?

What do you suggest if my friend is worried about her reaction to PPD (tb) test?

May need a: chest xray. There is a blood test called Gold's Quanitferon test your friend could do at a hospital or clinic. ...Read more

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If you were going to have a bad reaction (not a positive reaction) to a TB test (under the skin) would it happen right away or can it take days?

If you were going to have a bad reaction (not a positive reaction) to a TB test (under the skin) would it happen right away or can it take days?

1 to 3 days: It can take 1 to 3 days to get to its worst. This is for some people that have reactions after they have a positive test. If you are referring to a type of allergic reaction, this usually be almost right away. ...Read more

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Is it possible to be allergic to the TB test?

Is it possible to be allergic to the TB test?

Distinctly unusual: Anything is possible but allergy to the TB test would be distinctly unusual. ...Read more

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What do positive TB test results mean? How should I interpret the positive result of a TB test?

Infection with Tb: When someone is infected with tuberculosis (TB) germs, the body develops a protective response against them. The TB skin test is a test of the body's response to tb, not the germs themselves. One can have an active infection where they are coughing out TB germs and are a risk to spread tb. Or the body may have had the infection long ago and controlled it so there is no risk now of spread. ...Read more

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Positive test result for TB my husband got a job offer and had to get a TB test. He went back to get the results and the spot is slightly red and barely over 10 mm. He is convinced that the results are positive and as a result he won't get the job. The

Hello. : Hello. You can have an overlying are of redness, that doesn't mean the test is positive. I always used the ball point pen method to read the TB test. You gently move the pen back and forth to determine where there is underlying induration. Being PPD positive and having tuberculosis are two very different things. Please have him talk to the person who administered the test to find out the result. You are checking for inducation and not color. Take care. ...Read more

Dr. Klaus D Lessnau
1,183 doctors shared insights

Tuberculosis (Definition)

Is an infection in the body with mycobacterium tuberculosis. It is almost always acquired via the respiratory tract from which it can spread to other organs. After that, the immune system walls the bacteria off. All of this usually occurs without symptoms. After that, activation of the infection can occur in about 10% of the total patients. Half of this risk is in ...Read more


Dr. John Chiu
2,479 doctors shared insights

Allergies (Definition)

Allergies occur when your immune system is triggered by envirionmental factors it should ignore--for example, pollen in the air, or dander on a cat or dog--and creates cells to fight against them. An allergic reaction typically causes itching, congestion, or drainage, and ...Read more